Hydraulic press



May 18, 1943 J. O. HOLMES Emu HYDRAULIC PRESS I a 2 n i m E 6 a? w anNvENToRs 2 0.. O Q Q 0 ATTORNEW May 18, 1943 .1 Q. HOLMES ETAL HYDRAULICPRESS Filed July 8, 1941 '6 Sheets-Sheet 2 IZATTORN E YS May 18, 1943 J.QQ HOLMES arm.

HYDRAULIC PRESS Filed July 8, 1941 ATTORNEY.

6 Sheets-Sheet 3 May 18,1943 J. Q. HOLMES ETAL HYDRAULIC VPRESSYY 6Sheets-Sheet 6 Filed July s, 1941 /l VEINTORJV J5 2m 2* r-FJ TORNEY M m?a i W 4% 3 /+m ,4 Wm W/ N o .1 m. r4 W I, p w u n m m, w am.

Patented May is, 1943 p I nvmmumc mass John Q. Holmes and Calmer E.Gordon, Anderson,

Ind., assignors to General Motors Corporation, Detroit, Mich., acorporation of Delaware Application July 8, 1941, Serial No. 401,544

2 Claims.

This invention relates to hydraulic presses having rotary plateconveyors carrying a plurality of work holders which are automaticallymoved into position to be operated upon by the ram of the press. v t

It is an object of the invention to provide a self contained hydraulicpress unit of the enclosed type which can be adapted for various kindsof workand operations by the selection of suitable subassemblies .of anumber of inter changeable subassemblies.

In the disclosed embodiment of the press this object is accomplished byproviding a table supported by a base which encloses a reservoir forcontaining a pressure fluid and a motor drive pressure pump.unit'mounted over the reservoir. The table supports a pedestal ononeside of which is mounted a ram unit providing one or morerams operatedby pistons operating in hydraulic cylinders. The table supports a rotaryplate conveyor or dial feed which maybe one selected from a number. ofinterchangeable dial.

feed units. 'The pedestal, which supports the ram unit, provides anenclosure for a dial feed operating mechanism and for a cam operatedvalve for controlling the admission and the discharge of.pressurevfluid, with respect to the ram cylinder in timed relation withrespect to movements of the dial feed. The dial 'feed operatingmechanism and the valve-controlling cam are operated by an electricmotor contained within the housing provided by the pedestal.

Further objects and advantages of the present invention will be apparentfrom the following description, reference being had'to the accompanyingdrawings'whereiri two embodiments of the present invention are clearlyshown.

In the drawings: I

Fig. lis a side elevation ofjan hydraulic press embodying the presentinvention.

Fig. 2 is a front elevation.

Fig. 3 is a fragmentary side elevation of the press shown in Fig. 1, butwith a dial feed of larger diameter than shown in Fig; 1.

Fig. 4 'on Sheet 2 and Fig. 6 on Sheet 3, together constitutea'sectionalview on line 4-4 of Fig. 2.

Fig. on Sheet 2, and Fig. '7 on'Sheet 3, to-

gether constitute a view in the direction of arrow 5 of Fig. 1 withcertain parts of the frame work in section to show the interior.

Fig. 8 is a composite view in arrow 8 of Fig. 3 and comprises segmentsAB BC and CA. Segment AB is a plan view of the dial feed; BCis asectional view on line'BC of Fig. 9; and the segment CA is a sectionalview on the line CA of Fig. 3.

the direction of Fig. 9 is a sectional view on line 9-9 of Fig. 8.

Fig. 10 is a sectional view on line Ill-l0 of Fig. 8.

Fig. llis a. sectional view of a friction clutch unit taken on the linel|--ll of Fig. 5.

Fig. 12 is a sectional view of a flexible coupling" 14 of Fig. 15 andshows the underside of the upper subassembly of the tool which operatesupon the work.

Fig. 15 is a sectional view on line |5l5 of Fig. 13.

Fig.'16 Fig. 15.

Fig. 17 is an enlarged fragmentary sectional view of the assembly ofparts which are assembled by the machine.

Referring to Figs. 1 to 7, the machine comprises a base 20 providing atank 2| divided by baffle walls22 and 23 (Fig. 6) for containing ahydraulic pressure fluid. These walls tend to eliminate the effects offoaming of the fluid. The tank 20 supports a cover plate 25 providing isa sectional view on line .l6- l6 of .a base for supporting certainelements of the pling and flywheel fan unit 33 shown in section in Fig..12. The unit 33 comprises a hub hav ing a-keyway35 for receiving a keyby which the hub-34 is connected with shaft 3|. The hub 34- supports asleeve 36 having a flange 31 connected by webs 38 with the flywheel rim39. The webs 38 are shaped to providefan blades. During-the rotation ofthe unit 33 air is caused to flowin the direction of the arrows 40 and4| thereby inducing the flow of air around the motor for coolingpurposes. "The sleeve is keyed to'the hub 34 by a plurality of dowelpins 42 which serve to connect the hub also'with a plate-43 integralwith hub '44 keyed to the shaft 32.

The shaft 32 turns a rotary pump 45 which withdraws pressure fluidfromtank 2| thru a pipe 46 and discharges the fluid under pressure thrua pipe 41 leading to one or more pressure cylinders to be described. Thepressure cylinder discharges thru, piping connected thru pipe 48connected with a return pipe 4! which serves also as a by-pass in casethe hydraulic pressure exceeds a certain amount. A by-pass valve 58.connects pump 45 with pipe 41, and automatically opens a by-pass fromthe pump 45 to the tank 2I thru the pipe 48' when the pressure exceeds apredetermined limit which can be adjusted. The unit5I -is a pressuregauge connected with valve 58 by a hand operated valve 52.

The plate supports two side plates 58 and 8| of channel shaped crosssection as shown in Fig. 7. The plates 88 and GI are joined at both endsby a plate 82, Fig. 2, thereby providing a box-like frame which enclosesthe motor driven pump 45. The plates 54 and ii are provided withopenings 58a and Na respectively, covered by panels of wire mesh 83. Airfor ventilating the pump may enter thru the screened openings 88a andHo. Th frame members 88 and GI sup- Fig. 2 or the right hand faceof-wall 12, as viewed in Figs. 1 and 4, is provided with a mounting pada tool subassembly I25. The ram I23 is prevented port a platform ortable 18 which supports a and 18 are shaped so as to receive a curvedplate 88 anda flat, rectangular plate 8|. Thus the web 12 of the casting1| its side walls 18 and 18 and the plates 88 and 8I provide anenclosure for an.

electric motor and the mechanism operated thereby for driving the rotaryconveyor or dial feed'of the machine and for operating the timing camfor controlling a valve which controls the intake and exhaust ofpressure fluid with respect to an hydraulic cylinder which operates thepressure ram of the machine.

The walls 18 and 18 provide brackets 82 for receiving a plate 83 whichsupports a power operated unit 84 comprising an electric motor 85connected with a shaft 88 thru the medium of speed reducing gearing in ahousing 81. As shown in Fig. 11, shaft 88 is connected by key 88 with asleeve 88 provided with a flange 8| to which friction plates 82 and 83are attached by a plurality of rivets 84. The sleeve 88 is horizontallysplined at 85 to provide a driving connection with a plate 88 to whichfriction plates 81 and 88 areattached by a plurality of rivets 88.Between the plate 82 and th plate 98 there is located a friction discI88 having a driving connection to the integrally splined portion I8I ofthe flange I82 of a disc I83 attached by screws I84 to a sprocket gearI85. The flange I82 is provided with a plurality of sockets I88 each forreceiving a spring I 81 for exerting pressure toward the right against anut I 88 attached to a screw I88 the head I II of which bears against apressure plate I II bearing against the friction disc 81.

The sprocket gear I85 of unit 88 is connected by a chain II2 with asmaller sprocket II3 keyed to a shaft II 4 the left end of which isjournalled in a ball bearing II5 supported by bracket H5 attached totable 18 as shown in Fig. 4. Shaft II4 operates a cam II5 for engaging aroller I I1 on the end of a horizontal valve-operating reciprocatingrod, not shown. A spring, not shown, urges roller I I1 toward the rightand against the cam II6 having lands IIGa, H81), and N80. The

roller H1 is moved by the cam H6 or by the spring referred to in orderto control the operation of a valve I28 with which the pipes 41 and 48are connected.

The front fac of the wall 12 as viewed in from rotating by a key I25attached to casting I22 and received in a groove I21 in a ram I23.

Ram I23 receives a screw I28 having a hex head I28. The head I28 isintegral with an extension I38 of reduced diameter having a head I3I oflarger diameter. Head I 3| is received by recess I32in piston rod I33.The part I38 is received by a notch I34 less in width than the recess ornotch I32. By turning the screw I28 the distance between the ram I23 andthe rod I33 can be adjusted in order to raise .or lower the ram I23 andthe tool unit I24 carried thereby when the piston I34 connected with rodI33 is in the lower position. Piston I34 is slidable within a cylinder I35 secured to a block I 38 apertured to receive a bushing I31 carrying aliquid sealing ring I38 secured by a plate I38 attached to the blockI36. Below piston I34, the cylinder I is connected by pipe I48, L I4I,union I42 and pipe I43 with valve I28. Above the piston I34, th cylinderI35 is connected by pipe I44, L I45, union I48 and pipe I41 with valveI28.

Referring to Fig. 5, the rotation of cam H8 is counterclockwise. Whenroller II1 rides on the land IIIia of cam II5, valve I28 is soconditioned that pressure fluid is admitted through the pipes I41 andI44 to the upper end of cylinder I35 while the lower end of the cylinderis connected by pipes I48 and I43 with the exhaust port of valve I 28.connected by pipes 48 and 48 with the reservoir 2I. When the roller II1rides on the land II 51; conditions are reversed so that pressure fluidwill be admitted to the lower end of cylinder I35 while the upper end.will be connected with exhaust. When the roller II1 rides on land 50,pressure fluid is trapped in the lower end of cylinder I35 and theoutput of the pump passes under low pressure to the reservoir. While theroller H1 is riding on the land II8c, the shaft II4 operates a mechanismfor rotating a rotary conveyor or dial feed to be described.

The casting I22 is provided with a groove I58 for receiving any oil thatmay leak through the packing I5I between the cylinder I35 and the blockI38. A tube I52 conducts the oil from groove I58 to a pan I52a (attachedto rod I28) which also receives any oil which may leak past the packingI38. Oil caught by the pan I 52a passes through a hole I52b and thenthrough a passage I53 of the casting I22, through a passage I54 ofcasting 13, and through a drain pipe I55 leading to the reservoir.

As stated before, casting I22 may be one of a series of interchangeablecastings, any one of which may be secured to the frame 1I.- Othercastings performing the function of I22 may be constructed so as tosupport a plurality of rams I23 and operating cylinders in case it isdesired to perform a plurality of operations simultaneously upon workcarried by a plurality of workholders carried by the conveyor. In casethe machine is provided with a plurality of cylinders I35, the pipes I43and I41 would be connected respectively with distributing manifoldsinstead of the single pipes I48 and I44. One manifold would distributepressure fluid to the lower porintermittently rotating the table tionsof all of the cylinders and the other manifold to the upper portions.These manifolds with theirbranch pipes would be enclosed within thehousing walls 12, 16 and 16.

Referring to Figs. 1 and 2, it will be seen that the shaft II4 extendsto the-right. of .theframe H and into a gear housing providedby acasting v I66 supported by the table 16. Shaft I I4 drives tance greaterthan the distance between the center of table I6I in frame 1|, it isnecessary to use a longer shaft II4a, Fig. 3. a

The mechanism for intermittently rotating the table I6'Ia will now bedescribed withreference 'to'Figs. 8,9 and 10. Housing I66d provides bearings at I64, I66for shaft 'II4a which drives a gear I66 meshing with agear I61 keyed to a shaft,

I66 (Fig. 16); Shaft I66 Isjournalled In bearings I66 and I66 providedby the housing I66a.

The right hand portion of the shaft I66 is tubular'and is externallythreaded at I6I to receive a nut I62 which when tightened causes thefolper tool unit I24. In Fig. v1 only. Onepair of tool units I24 and Iis illustrated. The turn table I6I may be provided with asr'nany as 14of; these particular units. The particular mechanism for shown but it issimilar to mechanism to be described in connection with the descriptionof the mechanism for rotating a turntable of larger diameter than theturntable I6I. For presentpurposes it is sufficient to state, referringto Fig. 4, that the table I6I is supported by a step bearing I62 restingon atubular boss I63 integral with the housing I66. A stationary shaftI64 fixed to bearing I62 and provides a journal engaged by bearings I65fixed to the hub I66 of the table I6I.i Tothe upper end of shaft I64 issecured boss I63 extends upwardly through the step a the hub I61 of atray I66 divided by integral ribs 7 I66-into a plurality of compartmentsI16. 'The turn table I6I supports a ring I12 carrying a plurality ofhard metal insert bushings I13, there being one bushing for eachworkholder I25. As

there may be some slight, lost motion in the mechanism for indexing theturntable I6I, it is necessary to bring each workholder I25 Into per-'fect alignment with the upper tool assembly I24. Therefore the uppertool unit I24 is provided with a pilot rod I14 which enters a bushingI13 when the tool unit I24 descends. The entrance end of bushing I13 isslightly tapered so that,

when the rod I14 descends, the lower end of rod I14 will cooperate withbushing I13 in such manner as to shift the table I slightly in o der toalign a workholder or lower tool unit I25 with the upper tool unit I24.b I

In order to transmit the force applied by the upper tool unit I24 to.the work and thence to the lower tool unit I25 carried by the turn tableI6I, that portion of the turntable ISL-carrying work being operated uponby the tools rides over the plane surface of a plate I15 supported by aknee I16 integral with the frame casting H and integral with a foot I11resting on the table 16. The housing I66 and parts carried therebyincluding the table IN and the tray I66 constitutes a unit which may beone of several interchangeable units with which the machine may beequipped. Another of these turntable units is shown in Fig. 3 whereinthe housing is I66a and.

other parts similar in character to those shown in Fig. 4 are numberedwith similar reference numerals with the aflix a. The turntable I6Ia isintended to carry as many as thirty-six workholdersl25a. Since itsdiameter is much greater than the diameter of turntable I6I, it isnecessary to use a longer table 16. Since a substantial portion of saidlonger table 16 extends out beyond the base. of the machine the rightand of table 16 is provided with nected by a tubular'strut attached'tothe base 26.

table I6 la is spaced from lat Wilma bracket I62 Sincethe center of thethe frame H at a dislowing. parts to be gripped between the nut I62supports and drives 'a cam unit I65 having a longitudinal splineconnection with shaft I66 as indicated at 166. The camunit I65 can beadjusted longitudinally along the shaft and. locked inthe'desiredposition of adjustment. For this purpose the central bore I66b of shaftI66 receives a rod 266 connected with the 'cam unit I66 by a cross pin26I extending through a transverse slot 262 provided in the shaft I66.Rod 266 is provided with'a portion 263 of reduced diameter threaded toreceive a nut 264. When the nut s tightened the following parts areclamped be- "ween the nut and a shoulder 265 of the rod 266, namely;anexternally threaded sleeve 266 havinga hex head. 261 and a washer 266.Whenthe nut 264.is slightly loosened. the threaded sleeve 266 may beturned. Since this sleeve is threadedly connected at 266 with the shaftI66, rotation of the sleeve 266 by applying a wrench to its head 261will cause the rod 263 to move axially and relative to the shaft I66.This will cause the cam unit I65 to be moved longitudinally with respectto shaft I66. When the camI65'has been located in the desired positionof adjust-' ment a nut 2I6 threaded on'the sleeve 266 can be tighteneddown against the right end of shaft I86 and the nut 264 can be tightenedagainst the washer 266 and the latter against the hex head againstsleeve 266. In this way, the rod 263 is secured in the desired positionof adjustment with respect to the shaft I66. The adjustin partsincluding the nut I62, the nut 2I6, the hex head 261 and the nut 264 areenclosed by a cu shaped housing 2 secured to the housing I66: by aplurality of screws 2I2.

The cam unit I65 is provided with a cam groove 226 for receiving camfollower rollers 22I. Each roller 22I is mounted on apin 222 attached toturntable Him. The cam groove 226, is so shaped that the table. I6la ismoving during about onehalf revolution of shaft I Ma and shaft I66 andIs stationary for about 'one-half revolution. The cam I65 is so relatedto the cam II6 (Fig. 5)

I which controls the valve I26 that, while the table a bracket I66 conisstationary the ram I23 moves downwardly to cause an operation to beperformed on the work piece and then the ram returns to upward position.I As the cam I65 is viewed in Fig. 8, it will be seen that one of therollers 221a is entering the groove 226 while an adjacent roller 22Ib ismoving from the groove, rotation of cam I65 being in the directionindicated by arrow I65a. By the time the roller 22Ia. has arrived at'thenoncamming part of the groove indicated at 226a the table I6Id will havebeen moved into such posi- Y tion that a workholder I25a will havej beenbrought into alignment with the tools controlled by the ram of the pressor at least into such positionthat the bushing I13a Figs. 3' and15 is inalignment with the pilot rod "4:: attached to the upper member of thetool unit. In order to make this alignment as' perfectas possiblethe'cam 185 is adjustable along the shaft I88 by the means" which has beendescribed with reference to Fig. I

Themechanism which is employed for index ing the smaller turntable I6I,Figs. 1 and 2, is

substantially the same as the mechanism shownv in Fig;v 8, for indexingthe larger turntable I8I a. When the machine is equipped with thesmaller turntable I6I having only 14 workholders there will'jbe only 14rollers 22I 'supportedby pins 222. Obviously these pins 222 will be muchcloser to the .jaxi s'of the shaft I64 than is shown in Fig. 8'.

In jthat case the cam I85'can bejmounted directly onthe shaft II4andgthe 'countershaft I88 can be nates a case made of Bakelite for anelectric switch. Within the case is located a conductor strap 231electrically connected and mechanicaliv secured by a rivet 232 with aclip 233 for receiving a cartridgefuse. These parts have beenassembledon a separate machine. The purpose of the tools shown in Figs.13, 14 and is to as-' semble with the'case238 three contact straps" 234;three terminal clips 235 and three connecting, tu-' bular rivets 236.The terminal clips 235 are a part of a resistance unit 231 used forcontrolling the speed of the smaller electric motor such as thedefroster motor or the heater motor of'an automobile. The function ofthemachine is to set the three tubular rivets 236 'by'a single stroke of-the press plunger or ram I23.

In Fig. 8 each work holder unit Ia is represented merely by a rectangle.This workholder' unit I25a will now be described in detail with ref-qerence to Figs- 13 and 15. It'comprises a base block 248 having grooves2 and 242 for-receiving the prongs of the fuse'clip 233 when the switchcase 238 rests upon the block 248. As shown in Fig. 15, the verticalouter face of the switch case 238 engages a vertical face of a block243. attac hed to'block 248. Block 248 supports three riveting anvilpins 244 each having a'pr'o-- jectio'n; 245. Upon each of the anvils'244there is placed-flangedown, a tubular rivet 236 the up:

per end of which has not yetbeen upset. Each pin 245 will "project thruthe opening 'of a rivet.

Then the three terminal clips 235, previously apertured to receive therivetslwill be"placed around the rivets with the main'part of the'unit231 resting in a groove 246 provided by b1ock248.

Then the switch case 238'will be placed in posi-"- tion, each of threeholes pre-formed-in the case V 165' 284, located within the case 238 areeach placedprojecting "end l'por'tio'n's 238 receiving arivet 236. Thencont'actstraps around the upwardly the rivets 236. H The manipulation ofthe workpieces thereof between the tools scribed.

from which the switch assembly is'madefisperforrnedby the operators ofthe machine who are located at one side of the turntable 1 61aanjd'loadthev workholder units I25a in advance of movement whichwill nowbefdegi In the form of tools shown in Fig, '15 the upper tool unit-124acorresponds in function to the-upper tool'unit I24 of Fig. "1'.Ib'c'omprises a-plate 258 counterbored at 25f 'is receivefa disc'252-secured to the plate by screws 253;""Fr1omdisc' 283 there extendsupwardly arod "254 which (as shown in Fig. 4) isreceive'd' within arecess 123a in the ram I23 and is secured by a screw I23b' and a wedgenut I23c. To the plate 2581s attached butthru the interposition of amechanism ineluded in a riveting unit 268.

The unit268 comprises a base 26I to which screws 262 secure two parallelbars 263 providing ways for the guidance for a sliding plate 264supporting a bracket 265 grooved at 266 and carrying plates 261 thusproviding ways for the vertical sliding movement of a block 268. Thebase 264 is provided with a downwardly projecting pin 268 engaged by'aspring 218 occupying a slot 211 in a pressure plate I150, correspondingin function to plate I15 of Fig. 4. Plate 264 and bracket 265 and blockI68 are caused to move into position shown in Fig. 15 against the actionof spring 218 by the cooperation of a cam bar 212 carried by plate 258with a roller mounted on a rod 214 and occupying a slot 215 in bracket265. When the plate 258 is in upper position the pilot pin same timetheblock 268 will have been urged upwardly byspring 211 until a stopsurface 218 engages a pin 219 carriedby the bracket 265. Therefore, whenthe plate 258 is in the upper position, the portion of the bracket 268and parts carriedthereby' which are adjacent the switch case 238 will beso spaced from the case 238 that the case may be moved adjacent tobracket 268 by the turntable without interference, During downwardmovement of plate 258 the cooperation of earn 212 with roller 213 causesriveting anvils 288 carried'by block 268 to be brought into alignmentwith the riveting 'anvils 244 of block 248 and with the rivets supportedthereon; and a spring urged pressure pad 281 will be located above theupper side'of the box 238. Following this movement of the block 268, apin 282 carried by the disc 252'will engage the block 268 to cause ittomove downwardly to the position shown so that the pressure pad 28I' willbe urged by a spring 283 against the top of the box 238 tohold' theassembly in position while the riveting .anvils 288 engage the rivets236 to swedge their upper ends over against the contact straps 234'Following the I as indicated at 236a in Fig. 1'1. riveting operation andwhile the turntable I6Ia is stationary, the plate 258 is caused toreturn movetowa rd the .left from the'position shown inFi'g; 15 'so thatthe turntable I6Ia is free to' move the riveted assembly of switch case238 and other parts away from the riveting tools and to move 'jth'esucceeding unrivete'd assemblies into position for operation by thesetools. I

The tool. units'shownin Figs. 13 t 1'? are merely'illustrative of thetypes of work which may be carried out by hydraulic riveting-presses.Quite obviously the tools will vary according to the'change 'ofthe work.However, it is apparent that each of these tools will generally comprisean upper member adapted to be secured to the ram of the hydraulic pressand a lower member in'- eluding a work holder mounted on the turn table.The two members I 24 and I25 may directly co operate as shown in Fig. 1,or indirectly thru the interposition of a unit such as 260 in Fig. 15.Some types of work requires operations to be performed in steps. Ifthere are two steps to be performed the machine can be equipped with twohydraulically operated tool units which perform operationssimultaneously upon work carried by the lower tool units or workholders. The machine may be e'quipped with a bank of three hydraulicallyoperated rams carrying three different upper tool units for performing aprogression of operations upon work assemblies mounted upon lower toolunits or work holders.

The pump motor 30 and the turntable motor 85 are started and stoppedfrom either side of the machine by push buttons 300 (Fig. 1). The base20 provides a pocket 30! (Fig. 7) for housing an overload circuitbreaker unit 302 which protects the motor 30. The unit 302 is reset by apush button 303 (Fig. 1). While the motors 30 and 85 are operating, theturn table I6! of Fig. 1, or IGIa of Fig. 9, rotates intermittently tocarry the work pieces located on the work holders I25 01 Fig. 1 or |25aof Fig. 15 successively under the tool operating ram I23 which is causedto move down and up while the turn table is stationary. The loading ofthe work holders and the removal of assembled parts from the workholders can be carried on while the turn table is moving as well as whenit is stationary,

While the embodiments of the present invention as herein disclosed,constitute preferred forms, it.is to be understood that other formsmight be adopted. all coming within the scope of the claims whichfollow.

What is claimed is as follows:

1. A hydraulic press comprising, frame supported by the base andhousing; ed upon a base; a providing a a ram sub-assembly detachablymountits frame and exterior to the housing and comprising a verticallymovable, tool supporting ram, a piston connected with the ram and afluid pressure cylinder receiving the piston; a dial-feed sub-assemblydetachably mounted upon the base and comprising a turn-table forcarrying a plurality of work holders adjacent to the ram and the toolcarried thereby, and comprising a mechanism for intermittently rotatingthe turn-table; and a motor-operated mechanism located within the framehousing and operatively connected with the turn-table rotating mechanismand including a cam-operated valve for controlling the passage ofpressure fluid into the cylinder of the ram unit and the exhaust of saidcylinder in timed relation to movements of the turn-table of the dialfeed.

2. A hydraulic press comprising, a base providing a tank for pressurefluid; a base cover; a housing supported by the cover; a motor-drivenfluid pressure pump located within the housing and supported by thecover; a table supported by the housing; a frame supported by the tableand having a vertical wall intermediate the ends of the table andproviding a housing at one side of the wall; a ram sub-assemblydetachably mounted upon the frame wall and exterior to the housingprovided by the frame, said sub-assembly comprising a verticallymovable, tool sup-' porting ram, a piston connected with the ram and afluid-pressure cylinder-receiving the piston; a dial-feed sub-assemblydetachably secured to the table and comprising a tum-table for carryinga plurality of work holders adjacent to the ram and the tool carriedthereby, and comprising a mechanism for intermittently rotating theturn-table and a drive-shaft extending from the dial-feed unit and intothe housing provided by the frame above the table; and a motor drivenmechanism located within the frame-housing for driving the shaft andincluding a cam mounted on the shaft for controlling the valve in timedrelation to operation of the dial feed.

JOHN Q. HOLMES. CALMER E. GORDON.

